发明授权
- 专利标题: Information recording medium and information reproducing apparatus
- 专利标题(中): 信息记录介质和信息再现装置
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申请号: US09486751申请日: 2000-06-16
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公开(公告)号: US06580677B1公开(公告)日: 2003-06-17
- 发明人: Norio Chiba , Yasuyuki Mitsuoka , Manabu Oumi , Nobuyuki Kasama , Takashi Niwa
- 申请人: Norio Chiba , Yasuyuki Mitsuoka , Manabu Oumi , Nobuyuki Kasama , Takashi Niwa
- 优先权: JP10-191860 19980707
- 主分类号: G11B700
- IPC分类号: G11B700
摘要:
There is provided an information recording medium and an information reproducing apparatus capable of carrying out information reproduction and tracking control by utilizing near-field light. A data bit 12 of a convex having a section orthogonal to a tracking direction in a triangular shape is formed on an information recording medium 3 as an information unit, by scattering near-field light formed at a reproducing probe 1 at inclined faces of the data bit 12 with directionalities, fluxes of reflected and scattered light thereby are detected by reproduced light detectors 6 and 7 arranged symmetrically in a left and right direction relative to a central axis of the reproducing probe 1 along the tracking direction, a differential signal between the detected signals is outputted by a difference circuit 20 and an actuator 22 is driven by the differential signal via a tracking signal forming circuit 21 and a position of the reproducing probe 1 is controlled to carry out the tracking control.
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